Segmental rotary valve.



w. A. Gnu.V

SEGMENTAL ROTARY VALVE. APPLlcMmN m50 MAR. 26. 1915."

Patented Dea-14,19?.

/Nl/ENTH WW1/l.. Gill,

WITNESSES:

M50/milf@ A TTHNEY WJLLLIAM a.. Ginn, or ronrtnnn, onneon,

SSItGNR-TO G-ILL-.GOOK VLVE C0., 0l?

remnant, unisson, a CORPORATION or onneon.

sneinnn'rnt ROTARY VALVE.

tisanes.-

Specilcation of Letters Patent.

Patented Deo. ML, Mil( application me@ March 2e, 191,5. serial no. 17,281.

To all whom t may coment:

Beit known that l, "W'ILLiAM A. GILL, a

citizen of the United States. and a resident' or" Portland, county `of Multnomah, land State of Oregon, have invented a. new and use-ful Improvement in Segmental Rotary Valves, of which the followingis a speciic'ation.

My invention relates to'improvements in rotary valves 'for internal combustion vengines, and has specifically to do with a valve made of. longitudinally divided segnients,

' ing into the interior of the valve between' such, for example, as the typ'eof valve describedin-my Letters Patent dated March 9, 1915, No. 1,130,896.

@ne of the main objects of my invention consists f in combining with 'the valve an inneimshell or thimbleelike lining,' revolving with the valve, thoughV spaced in vgreater part from the inner faces of the valve parts, and serving to prevent lubricant from Workand through the spaces of the valve segments. lf the 'lubricant is permitted', to Work into the interior ofthe valve, it would cause undue carbonization injthe'combus tion .chamber and also produces very undesirable conditions.

Another advantage -'obtained by myA iin-I provcment is there will be nounnecessaryV -pressure ofthe segmental lvalve parts 4againstthe Walls of .the valve chamber, for

the thimble being a one-piece construction,

sustains the-strain of the explosionv inthe main, and; proportionately protects the valve :i 1";- llout' at the same time since the tble ismade .of slightly smaller crosssection than 'the interior of the valve, When the latters parts are seated against'the Wallsotthe ,valvechamben sufficient gas is permitted to pass, between the exterior of the thiinble and the inner face ofthevalve parts to permit the latter to beheld eiectivelyby 'the pressure-of the gas in gastight rela-tion with the Valls of the valve chamber.

Another advantage obtained by my irnproveinent is that sincel the thimble is notA in close mechanical c'OntaCtWith the valve,

but .is in greater part spaced'therefroin, the

thimble will have a tendency to retain a Ahigher temperature' in itself, and thus-maintain a higher temperature on the interior- Wall-of the combustion-chamber of the valve than that normallv maintained by the valve that lfrequently in v rior thimble; horizontal section showin iii-"'Fig. 3; thus parts, in .so'doing increasing the thermal gas in the space between the thimble and the Wall parts will serve 'as an insulator,

land effectively retard the wasteful dispersion of the heat, through the medium of the valve, the Walls of the valve chamber and the Water jacket.

Another advantage v obtained by my improvement is this: Since, through. the medium of a thimble, the valve uparts are maintained in relatively lower temperature, the etliciencyof the film of lubricant covering the exterior .of the valve partsjs not dimin- -ished as would be the'case if'th valve .were

heated to ahigher degree.

. e'tici'encyof the motor'. In other Words; the

Another advantage of my invention is alves of the typmentioned, since the-fuel used is heroseneyor' othenheavy oils,q it is advantageous to' use' Figure is a diagranlrnatic illustration ot. my invention, showing a` vertlcal section of,

a.v segmental valvewprovidedwith a'n intethe eview crrespons liv-ith the the inner facce-fthe far half of the valve is seen, and. thevalve casing and coupling .of valve to drive-head are shown in' section bybroken lines; Fig. 2 is a view similar to Fig'. l, but showing the valve and thim- -ble--turned through an angle of 90?, and

thus both valve segments are shown in sec'- tion; Fig. 3 4is a horizontal' section on the lin'e 3 3 of Fig. l. A i) The valve 'casing or chamber is indicated y a, l f l The valve Ais made of longitudinally divided segments fib.-

c is the valve. drive-head. The valvel casing liS-made with inlet and exhaust openings d andge, respectively, and

dicated by g, g.

In the 4valve is inserted an inner shell vorV thimble h., shaped approximately to -correspond with the contour of the inner faces of' the valve, but of smaller exterior diameter than the interior space of the valve, when its parts are pressed against the walls of its chamber, so as to thus provide a space between the exterior of the thimble and inner faces of the valve parts, for the purposes speciiied. The thimble is madewith flanges z', at the margins of its two apertures, or openings j, j', which correspond with the portslc, 7c of the valve; and such flanges extend into the ports of the valve and serve to connectthe thimble with the valve so that it will rotate with the latter. The edges of the valve ports are recessed so that the tops ofthe flanges j, j, of the thimble will come flush with the upper surface of the valve ports, as shown in Fig. 1. The bottom of the thimble hy, is

- made with` a peripheral flange Z, which,

however, is so arranged as not to touch the sides or the bottom of the valve chamber.

The flange Z serves to prevent the film of lubricant, which runs down the'space between the thimble and the valve, from fiowing between the faces m,'of the valve parts, down to the bottom of the valve and thus entering thev combustion chamber.

The manner in which my device operates is as follows: The spaces between the abutting valve segments are indicated by the 'line m, in Figs; '2 and 3. As the valve rotates, the lubricant would have a tendency to force its way through such spaces between the valve parts and in this way work itself into the interior of the valve to the combustion chamber, but cannot because the -thimble efectually seals said space m. Furthermore, a portion of the force of the eX plosion is taken up by the thimble without acting directly on the valve, and the valve being correspondingly relieved. In this way, as apparent, the thimble acts as a 'shock-absorber and prevents the full forceof the explosion being imposed on the valve parts, which would cause undue pressure and have a tendency to crowd out the lubricant.`

claim: 1. The combination with a segmenta valve of the type mentioned, of. a thimble inserted within the valve, the exterior diame eter ot' the thimble being less than the diameter of the inner space of' the valve when its segments are seated against the walls of its chamber, said thimble being provided with apertures corresponding to the ports of the valve segments, and means for operativelyconnecting the thimble with the valve so as to rotate with the latter.

2. Thecombination with a segmental valve of the type mentioned, of a thimble inserted within the valve, the exterior diameter of the thimble being less than the dialneter-of the inner space of the valve when its segments are seated against .the 'walls of its chamber, said thimble being provided with apertures corresponding to the ports of the valve segments, and means for operatively connecting the thimble with the valve so as to rotate with the latter, said thimble being made with a peripheral flange projecting from its open end over the valve segments, for the purpose specified.

3. The combination with a segmental valve of the type mentioned, of a thimble inserted within the valve, the exterior diameter of the thimble being less than the diameter of the inner space of the valve when its segments are seated against the walls of its chamber, said thimble being provided with apertures corresponding to the ports of the valve segments, said thimble being made with flanges on the margins of its said apertures, said flanges extending into said valve ports and thus serving to connect the thimble with the valve.

4. The combination with a segmental valve of the type mentioned, of a thimble inserted within the valve, the exterior diameter ot the thimble being less than the diameter of the inner space of the valve when its segments are seated against the walls of its chamber, said thimble being provided with apertures corresponding to the ports of the valve segments, said thimble being made with flanges on the margins of its said apertures, said flanges extending into said valve ports and thus serving to connect the thimble with the valve, said thimble being made with a peripheral flange projecting from its open end over the valve segments, for the purpose specified.

VVLLIAM A. GILL.

Witnesses:

WM. C. SoHMrrT, D. E. Cna. 

